Heptane

Heptane or n-heptane is the straight-chain alkane with the chemical formula H3C(CH2)5CH3 or C7H16, and is one of the main components of gasoline (petrol). When used as a test fuel component in anti-knock test engines, a 100% heptane fuel is the zero point of the octane rating scale (the 100 point is 100% iso-octane). Octane number equates to the anti-knock qualities of a comparison mixture of heptane and isooctane which is expressed as the percentage of isooctane in heptane and is listed on pumps for alkane (petrol) dispensed globally.

Synonyms
Heptane I n-heptane
Chemical Formula
C7H16
CAS Number
142-82-5

Characteristics

Molar Weight
100.2 g/mol
Melting Point
−90.54 °C
Boiling Point
98 °C
Flash Point
-3.9 °C
Density
0.684 g/mL at 20 °C
Forms
Flammable, Liquid (clear), Colourless

Uses and Applications

Key applications

  • Adhesives and Sealants
  • Solvents
  • Pharmaceuticals
  • Personal care

Industries

  • Rubber
  • Beauty & Personal Care
  • CASE & Construction
  • Energy Services